+0

# Linear Equations

+1
219
5
+250

How many terms of the sequence

$$\sqrt{1},\sqrt{2},\sqrt{3},\sqrt{4},\ldots$$

are less than or equal to 20?

Oct 19, 2018

#1
+18368
+2

20^2 = 400         SO  there are 400 terms less than or equal to 20

Oct 19, 2018
#2
+524
+3

To solve this, we first have to find the biggest term in the sequence, this is obviously the square root of 400. Since we know that the sequence is increasing by 1 for each step, we can conclude that there are exactly 400 terms.

Oct 19, 2018
#3
+250
+1

Thanks! that makes sense but how do you reconize the type of problem so easiely? ugh I appulaud the smarts!

Oct 19, 2018
#4
+100588
+1

Easy....both EP  and CU  are genuises   !!!!

CPhill  Oct 19, 2018
#5
+18368
+2

Thanx for the compliment....!   ( but I am more like a slide rule or abacus )

ElectricPavlov  Oct 19, 2018