Question

Observe the series given below and write the generalised formula.
a) 2 4 6 8 10
b) 1 11 21 31 41 51
c) 7 12 17 22 27 32
d) 2 5 8 11 14 17

Answer 1

a)

here difference d is 2 and first term a is 2.Hence nth term i.e., generalized formula is a+(n-1)d=2+(n-1)2 i.e, 2n

b)here a is 1 and d is 10.Hence nth term is 1+(n-1)10 i.e., 10n-9

c)here a=7 and d=5.Hence nth term is 7+(n-1)5 i.e, 2+5n

d)here a=2 and d is 3 .Hence nth term is 2+(n-1)3 i.e., 3n-1

Answer 2

Answer:

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