TOV SPM 2012 ~ Add. Maths ~

Remember This! (#4)

Remember This! (#3)

Remember This! (#2)

Students, do you remember when these formulae are used?

These are the formulae that you use in topic Differentiation (Pembezaan) and Integration (Pengamiran)..

Remember This!

These are the formulae used in solving algebraic problems. So, 'gune sokmo deh'!

We use Formula (1) to solve quadratic equation. You can find the roots of a quadratic equation with this formula. There are also another methods to find the roots of a quadratic equation;

 i) by factorisation, and ii) by completing the square.

Formula (2) , (3)  and (4) are laws of indices.

Formula (5) , (6) , (7) , (8) are laws of logarithms.

Formula (9) and (10) are formulae for arithmetic progressions (A.P). 

Formula (9) : to find the nth term of an A.P

Formula (10) : to find the sum of the first nth terms of an A.P 

Formula (11) , (12) , and (13) are formulae for geometric progressions (G.P)

Formula (11) : to find the nth term of a G.P

Formula (12) : to find the sum of the first nth terms of a G.P. To use it depends on the value of 'r'. 

If  r >1 , use the formula on your left,

If r <1 , the the formula on your right

Formula (13) : to find the sum to infinity of a G.P

You can distinguish the formula for A.P and the formula for G.P by looking at the 'd' and 'r' in each of these formulae. 

• If you see 'd', then it is for A.P because d = common difference, and a common difference is the characteristics of an A.P. 
• When you see 'r' in the formula, then use it for G.P because r = common ratio, which is the characteristic of a G.P.