Question

EXERCISE - 6.3
Find the sum of the following APs:
(1) 2,7,12, ..., to 10 terms.
(i 0.6, 1.7,2.8, ..., to 100 terms.
Di​

Answer 1

Step-by-step explanation: Sn = n/2[2a+(n-1) (d) ]

i) S10= 2(2)+(10-1)(5)

S10= 4+45

S10= 49×10/2= 245

ii) S100= 2(0.6)+(99)(1.1)

S100= 1.2+ 108.9

S100= 110.1×50= 5505

Answer 2

Answer:

1) 245

2) 5505

Step-by-step explanation:

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