HP HP-35 - Page 20

SECTION
(d) Find Ihe area of a elrcle with a 3 foot radius, i.e ..
A "
JTR2 w!lh R 3 fet't.
Press
"'"
@
3
I£iiliIl
3.
EI
9 .
~
3. 1 4 15926 5 4
EI
28. 27433 389
P OW ERS O F NUM BERS
We have al readv set'n how to square a number and to take
ilS reciprocal, Ihatls, how to lind Xl and X- I. The I'll
key leiS you Imd any power of a posilillC number. Sup-
pose
you wont to lind 2xZxZx2x2x2x2 27. In most
calculators you·d have 10 do all six mu l tiplications. Here·s
how
YOU do it with Ihe HP- 35:
Press
S"
Comments
0
7
Enter the power. y.
I£iiliIl
7
Put It in Y
lID
2
Enter the number, X.
l'DI
"8
Take 27
The power (y) does nOt have to be a whole number: It can
be any number. The HP-35 performs XY wllh an mternal
program using logarithms and the answers are nOI always
exael
to Ihe last decimal place (sec Accuracy page 21). For
e ~ ample, 8
1
/
J
-
4. but" you key (ID !mE @
G rnJ III you get 3 999999999 Call It 4;
the error is . 000000001, or only one bl i lionthl
9