Question

Scholmo reads 7 pages of his book on the first day and his rate of reading then goes up by 3 pages each day.
a) How many pages will he have read on the 8th day?
b) After how many days will he have read more than 425 pages?
a = 7
d = 3

Now you can answer the questions:

T8 = a+7d

Sn = n/2 (2*7 + (n-1)*3) > 425

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