Question

prove that t(m+n)+t(m-n)=2tm ​

Answer 1

Answer:

t(m+n)+t(m-n)=2tm .... 1

tm + tn + tm - tn = 2tm .... 2

tm + tm + tn - tn = 2tm .... 3

2tm = 2tm .... 4

thus we can say that t(m+n)+t(m-n)=2tm its true

explanation :

here step 1 into step 2 :

(txm + txn )+ (txm - txn)

= tm + tn + tm -tn