Question

7.
If the mth term of AP is 3m + 4, then common
difference is
(a) 2
(b) 4
(C) 3
(d) 7​

Answer 1

what is this i don't know.......

Answer 2

$\huge\star\bold\red{ANSWER}$

Let m=1

then, 3m+4

=>3×1+4

=>7 ==>[A1]

similarly taking m=2

then,

=>3×2+4

=>6+4

=>10 ==>[A2]

Again taking m=3

=>3×3+4

=>9+4

=>13

$\star\bold\red{As}$$\bold\red{we}$$\bold\red{know,}$Common difference (d)=>A2-A1

=>10-7

=>3 $\bold\red{....ans....}$ [option (c) is correct]